Moisture curable compositions
US-2024400829-A1 · Dec 5, 2024 · US
Separating cyclic siloxanes from short-chain siloxanes having terminal hydroxyl groups
US8927752B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-8927752-B2 |
| Application number | US-201214233070-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jul 11, 2012 |
| Priority date | Jul 25, 2011 |
| Publication date | Jan 6, 2015 |
| Grant date | Jan 6, 2015 |
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Abstract
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Cyclic siloxanes are separated from short chain hydroxyl-terminated siloxanes by contact with steam at at least 650 hPa absolute. The cyclic siloxanes and other components which are separated by use of steam can be recovered by phase separation, and preferably used in other processes.
First claim
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The invention claimed is: 1. A method for removing cyclic siloxanes from a mixture which contains cyclic siloxanes of the formula (I) (R 1 R 2 SiO) m (I), where R 1 are alkyl groups having 1 to 12 carbon atoms, R 2 have the meanings of R 1 , or are aryl groups having 5 to 30 carbon atoms or alkenyl groups having 2 to 12 carbon atoms, and m is an integer of from 3 to 20, and which contains short-chain siloxanes having Si-bonded terminal hydroxyl…
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- What does patent US8927752B2 cover?
- Cyclic siloxanes are separated from short chain hydroxyl-terminated siloxanes by contact with steam at at least 650 hPa absolute. The cyclic siloxanes and other components which are separated by use of steam can be recovered by phase separation, and preferably used in other processes.
- Who is the assignee on this patent?
- Popp Alfred, Kaes Christine, Kaeppler Klaus, and 2 more
- What technology area does this patent fall under?
- Primary CPC classification C08G77/16. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Jan 06 2015 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).